This free tool from Autodesk improves the quality and the information content of DWG files generated from the Revit model and helps overcome a number of limitations of the built-in DWG Export feature
Define Layer Standards
"Break down" a layer into well defined components to make the process of assigning a layer a whole lot easier.
Leverage Shared Coordinates to create geo-referenced drawings by exporting sheets in your Revit model.
Create blocks with attributes from families and annotations
Create drawings for AutoCAD based facilites management systems directly from the Revit model.